Here is a shot from two nights ago, under the dungeon lights at our local high school soccer field.
I shot this with my MK IV at iso 6400 shutter at 1/1000 sec at f2.8 +2/3 ev. This photo was cropped in LR added 5 points of sharpening and 24 points of noise reduction
I have also included a file from my 1DX at 20,000 ISO everything else the same in LR. I just picked this up last week and wanted to play around with the high ISO.